Cecidomyia? irregularis, n. s.

Irregular, monothalamous, blister-galls, between veins. Usually more than one on a leaf. Projecting above mainly, presence indicated below by a light-colored, roughened space. On large-toothed aspen, Populus grandidentata. Not rare.

Harmandiola stebbinsae NEW NAME

A North American species, Cecidomyia irregularis Stebbins (1910), is preoccupied by C. irregularis Bremi and is here renamed Cecidoinyia stebbinsae Gagne. NEW NAME.

Cecidomyia irregularis Steb

Irregular one-celled, blister galls, mostly on upper surface, light colored, on large-toothed poplar, midge

Harmandia stebbinsae

Host: Populus grandidentata

Harmandia galls are monothalamous and yellow, green, or reddish. In late spring or summer full-grown larvae drop to the ground to overwinter. Various other cecidomyiids have also been reared from these galls. These include a Clinodiplosis sp., Mycodiplosis thoracica, and Rhizomyia absobrina, all presumably mycophages.

The gall is a blister, convex and reddish on the upper surface of the leaf, flat and light green below, occurring between or on veins.

Range: MA and MD